Improvement in planing-machines



tinte- MASSACHUSETTS. Y fr WM Letters Patent No. 111,632, dateduFebruary "l, 1871.A

IMPROVEMENT lN PLANING-MA-GHINESl l 'l'he Schedule referred to in these Letters Patent and making part of the same.

To all lwhom. it 'may concern:

We, JAMES GooDRIon and HENRY J. GOLBURN, of Fitchburg, in the county of \Vorcester and State of Massachusetts, have invented certain new and useful Improvements in Planing-Machines, of which the following is a'speciiication Nata-rc of thc'Invent/icn.'

The nature of our invention consists in certain improvements relating to the more complete adjnstment of the knife-cylinder, the pressure-feet, and the feedingapron to the article being worked, and are such as can only be understood by reference to the complete specication and drawing.

Description of thc Accompanying Drawing.

Figure 1 is a perspective view, showing my invention'embodied in a complete planing-machine.

Figure 2 is a plan of the same.

Figure Sis a vertical section of the same.

Figure Liis a vertical cross-section on the line :c s, fig. 2.

Figure 5 is a vertical section on the line yv 'y of iig. 2.

Figure 6 is a perspective, showing the pressure-feet in detail.

Gene-ral Dcscrc'pticn.

In the drawing- A A represents the-frame of our machine, to which the operating parts are attached.

'lhis frame has attached, internally, to its sides guide-rails, not shown in the drawing,upon which the lags H H* H2 H, figs. l and 3, of the endless feedapron run.

Under the cent-er of these lags double inclines, o o and n n', are attached, and so arranged in connection with the central guide-rail K K (which is inclined at each end, as shown in rigs. 2 and 3) that the upper 'face of the lag will assume a horizontal position as soon as the lag comes in vcontact with the central rail K K. v

By this arrangement no part of the lag, as it comes up ontothe straight part of the guides, will ,project beyond the proper level.

The inclines It* It and 7.: k1, figs 2 and 3, are not in the same vert-ical plane, so that the incline o o of the lag will come in contact with the incline la" jot' the center guide K, while the incline n n of thel lag will come in contact with the incline 7.1 L of the guide K. lhus the lags will maintain the level position while entering uponand leaving the guide K.

The object of the arrangement of the inclines n fn. o o on the under side of the lags, and the inclines k k1 l# ki on the central guide K, is to cause the. lags HH, Sto., to gradually assume a horizontal position Vbefore their upper faces reach the generatlevel of the apron.

.The advantage of this is, that as the lags pass up 'onto the straight part of 'y the guide the advancing edge will not extend above the general level, as it would in case there were no inclines on the under side of the lags.

It' desirable, thc inclines KK1 K2 Ka-may be curved.

.(J, iigs.l'and 3, i's a swinging frame, pivoted at. C.

llo this frame the cutter-head D and the adjustable weights C* C4 and pressure-bars yD1 areattached. The bars Dl are attached to'. the` swinging frame in the ordinary manner.

C is an adjusting-screw, by means of which the swinging frame G1 is adjusted to the work.

C* C* are swinging weights, pivoted to the swinging frame (ll at D2.

G5 C are adjustable pressure-feet, connected by pivots C7 C" to the swinging weights C4 0*.

B5, l and 5, is a pressure-arc, the ends of which rest on the swinging weights C4 G4. y

This pressure-arc is pivoted to the weighted lever B", so that the pressure of the weight B3 will act equally upon the swinging weight C* C4.

The rocker-shaft B and arc Bl serve t0 connect the lever B2 to the Aframe of the machine.

The pressure-rollers E E, figs. 2, 3, and 4, are connected to independent swinging arms Fl1 El E2 Ez, so that they are free to follow the surface of the article to be planed, the journals of thc-rollers having boxes so arranged that this action can take place.

E3 E, iig.' 4,. are yokes, the ends of which rest upon the arms E1 El Ez E?. l Upon the middle of these yokes springs E4 E* press, so that the arms El El E2 E2, and consequently the rollers E E, are pressed constantly downward against the work.

NVhat we claim as our invention is- 1. The combination ofthe lags H H1 H2, &c., having inclines n 'a' and o o', with the guide-rail K, having inclines 7e L" It2 It", as described, and for the purpose set forth.

2. The combination ofthe adjustable frame CL with the cutter-head D and pressure-bar Dl, as herein described, aud for the purpose set forth.

3. The combination of the lever B2 with theI arc B5, adjustable weights Cl C", and pressure-feet Oi, substantially as described and forthe purpose set forth.

4. 'lhe combination of the springs E* E* with the yokes E E, thc frames E211? El E, and the rollers E E, as herein described, and for the purpose set forth.

JAMES GOODRICH.

HENRY J. COLBURN.

Witnesses:

FRANK G. PARKER, E. A: NIcKnRsoN. 

